Allow square brackets in the option names; this makes it possible to use ConfigParser with GNOME-ish config files that use the internationalization conventions found in GNOME.
Allow square brackets in the option names; this makes it possible to use
ConfigParser with GNOME-ish config files that use the internationalization
conventions found in GNOME.

This closes SF bug #131635.

sk-/python2.7-type-annotator,sk-/python2.7-type-annotator,sk-/python2.7-type-annotator